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Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income Tax Disclosure [Abstract] |  |  |
Earnings (loss) from continuing operations before income taxes | $ 2,898 | $ (3,090) | $ (109)
U.S. statutory income tax rate | 21.00% | 21.00% | 21.00%
Change in tax legislation | 0.00% | 4.00% | 0.00%
State income taxes | 1.00% | 1.00% | 24.00%
Change in unrecognized tax benefits | 0.00% | 0.00% | (13.00%)
Audit settlements | 0.00% | 0.00% | 15.00%
Other | 2.00% | (1.00%) | (19.00%)
Deferred tax asset valuation allowance | (22.00%) | (7.00%) | 0.00%
Effective income tax rate | 2.00% | 18.00% | 28.00%

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